Feed-water heater and purifier



' (No Mod-e1.)

M. W. HAZELTON.

FEED WATER HEATER AND PURIFIBR.

No. 400,677. Patented Apr. 2, 1889.:

WITNESSES WMWKM ATTORNEY,

1!. Firms. mun -1m Wishinglm n. c.

UNITED STATES MILTON W. HAZELTON,

PATENT OFFICE.

OF CHICAGO, ILLINOIS.

FEED- WATER-H EATER AND PU RIFIER.

SPECIFICATION forming part of Letters Ifatentlifo. J=0O ,677, dated. April 2, 1889.

Application filed May 1, 1888. Serial No. 272,435. (No model.)

To all whom it may concern:

Be it known that I, MILTON W. IIAZELTON, of Chicago, countyof Cook, and State of Illinois, have invented certain new and useful Improvements in Feed-Water Heaters and Purifiers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, and to the letters of reference marked thereon.

This invention is designed as an improve ment on the feed-water heaters and purifiers for which Letters Patent of the United States were issued to me on October 7, 1884, and September 8, 1885, respectively,.and its object is to simplify and at thesame time increase the efficiency of such devices; and for this purpose the invention consists, principally, of new combinations of certain features that are common to water heaters and purifiers, by which better results are obtained, all of which will be hereinafter set forth.

Reference is to be had to the accompanying drawing, forming part of this specification, in which similar letters of reference indicate corresponding parts in the figure.

The drawing shows a partly sectional elevation with parts broken away to exhibit other parts of my improved heater and purifier. The heater A is an upright cylinder, which, for convenience sake, is-preferably set on top of the horizontal cylindrical purifier B. The engine exhaust-pipe (engine not shown) is represented at O, and thebranch which connects the pipe 0 with the top of the heater is shown at O. The feed-water tank D is set at a suitable elevation above the heater, and a pipe, D, provided with valve a, leads down from it into the elbow of the exhaust-steam pipe 0, directly above the opening in the top of the heater. The heating-cylinder A is partly or wholly filled with blocks 17 of hemlock, cedar, oak, or other wood whose sap will yield, under the influence of the hot water, an acid that will have an effect in precipitating certain of the impurities that may be contained in the feed-water. Secured on the out side of the heater are one or more pumps, G, (two shown herein,) whereby the water is drawn from the said heater through pipe 0,

and injected into the purifier B through pipe (I. The heating-cylinder is also provided withan overflow valved pipe, d, and a blow-off pipe, f, and beneath the opening in its top there is held by rods g a cone, upon which the feed-water from tank D is discharged, and by which it is better distributed over the blocks b, and made to offer the requisite surface to the action of the entering steam. It is found that the water entering through pipe D by condensing the steam entering through pipe 0 creates a sufficient vacuum to continually draw from the exhaust-pipe 0 all the steam necessary for the heating of the said feed-water and precipitating its impurities.

In the purifying-cylinder B, immediately beneath the mouth of the pipe d, is also a cone, h, held by rods h, for the purpose of better distributing the heated feed-water which enters from the heater A. This purifying-cylinder -B is provided with one or more manholes, 70, through which coke or other filtering substances may be introduced and removed,

and depending from the under side of this cylinder and internally communicating therewith is a catclrbasin E, in which is fixed a vertical partition, Z, as shown. A perforated diaphragm, F, is fixed in the cylinder B, a short distance from the delivery or catch-basin end thereof, and between this diaphragm and the more remote end the said cylinder is filled with coke or other filtering material, 11, while the space between the diaphragm and the cylinder end nearest to it and over the catch-basin is empty and unobstructed. As steam passes up the engine exhaustpipe C the valve a in the pipe D is opened and the feed-water flowing down through the said pipe D into the heaterdraws in through the pipe 0 and condenses sufficient of the exhauststeam to heat it (the feed-water) to a boilingpoint. Flowing over the blocks 1), whereby it may be partially purified, the heated water falls to the bottom of the cylinder A, whence it is drawn by the pumps G through pipe 0 and forced through pipe (1 into the purifier B against-the boiler-pressure therein. Passing through the coke or other filtering material in the purifier B, whereby the precipitated impurities in it are arrested, the water then flows through the perforated diaphragm F down into the catch-basin E on one side of the partition Z and up on the other side thereof into the unobstructed end of the cylinder B, as indicated by the arrows m. Steam from the boiler (not shown) is continually supplied through pipe into the top of the purifier, so that an equality of pressure is maintained in both, and the purifier being setwell above the boiler the purified feed-water will continually flow by its own weight through pipe 1) into the boiler. The water being made by the partition 1 to take a circuitous course through the catchbasin E, time is thereby afforded for the precipitation from itby gravity of allor most of the impurities or foreign substances it may still contain, and these may be blown off at any time through the valved pipe 8.

G, purifying-cylinder B, containing filtering substance II, and provided with distributingcone h, man-holes k, and perforated diaphragm F, catch-basin E, provided with partition Z, and having blow-oft pipe 8, and pipes 0 and 7), all constructed, arranged, and operated substantially in the manner and for the purpose specified.

2. 111 a heater and purifier, the combination, with heating-cylinderA, engine exhaustpipe 0, and water-tank D, of branch exhaustpipe 0', connecting the pipe 0 with cylinder A, and pipe D, leading down from tank D into elbow of pipe C, substantially as herein shown and described, whereby the cold feedwater from the tank D may be operative to condense the steam entering the pipe C, and thereby create and maintain suiiicient vac uum to continually draw steam from pipe 0, as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, in the presence of two witnesses, this th day of March, 1888.

MILTON \V. IIAZELTON.

Witn esses:

P. V. FITZPATRICK, E. A. BACHELDER. 

